Abstract
In the presence of dust particles in the plasma, it is shown that the well-known stability of the drift wave in a sheared slab geometry does not hold. Due to the presence of dust particles in tokamaks, the magnetic shear damping is reduced drastically. As a result, both the collisionless and collisional (dissipative) drift modes become unstable under the typical parameter regimes of a tokamak. Consequently, drift waves must still be considered as an underlying dynamic of anomalous transport in tokamak edges, where dust particles are found to be abundant.
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